Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Questions & Answers
Is the QD mount limited rotation? Expert Answer

The Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut QD mount does not limit rotation.

by Hunter, Gear Expert, September 2, 2022
Will this end plate work on magpul PRS gen 3 or PRS lite stocks? Expert Answer

According to Magpul the PRS Lite and PRS Gen 3 stocks are not compatible with aftermarket sling attachment endplates. So the Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut will not be compatible with either of those stocks.

by Hunter, Gear Expert, May 3, 2022
Customer Reviews
Helpful Positive Review best castle nut by Rob, Verified Owner, October 19, 2024
This is the only castle nut I use. I see no reason to use the old school staking method anymore. This is fast. It’s better. It’s easier.
1/1 found this helpful
Helpful Positive Review This, for any adjustable buffer tube build by Nick, Verified Owner, October 31, 2021
The days of staking castle nuts is over boys. This thing is the bees knees and I’m slowly converting all my receiver end plates to these guys. Prevent any marring and damage and the machining is always done to top notch quality. Can’t say enough abou...
Read More...
3/3 found this helpful
Helpful Positive Review Great Fit, Awesome finish by Jeffers, Verified Owner, July 12, 2022
I'm confident this castle but won't back out on It's own. While I'm a firm believer in "you get what you pay for" this was a little pricy for what it is. The anodizing or whatever coating is on these parts is smooth, consistent and is a satin black ...
Read More...
3/3 found this helpful
Helpful Positive Review Thinking Smarter by Ryan, Verified Owner, May 7, 2022
I read reviews and was hopeful. Met my expectations. Really nice and think everyone should get this if they build or customize AR parts. For its simple BUT SMART design, its kinda above what I want to pay. Would get way more sales if maybe it was lik...
Read More...
5/5 found this helpful
Helpful Positive Review Best End Plate available by TinCuda, Verified Owner, February 13, 2024
Thia is the best end plate available. The whole thing is steel including the QD socket. There is no need to stake the castle nut due to the ratcheting action of the locking mechanism. It's a little pricy but it will be the last one you will ever b...
Read More...
1/1 found this helpful
Helpful Positive Review Great innovation by Stimpy, Verified Owner, September 9, 2022
I’ve put three of these on rifles and PCCs that I own and have had zero issues with them. They’ve never backed out after thousands of rounds and I don’t think they ever would. It’s a great addition and I will continue using them on future builds.
6/6 found this helpful
Read All 112 Reviews

14% Off Gun Parts +2% Bucks

GETDLClick to Copy Coupon Code
Eligible models will have a savings offer and the coupon code to use below. Add the item to your cart and enter coupon code for savings on that select model! Limited time only. Cannot be combined with other promotions or offers.
Color: Black Gun Make: AR Platform Condition: New

Code: 2D5-REP-PWSRLSMP-RLCN-KIT

MPN: RLCN-KIT

UPC: 811154033673

List: $49.95Save $4.06
$45.89

Product Info for Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut

The Primary Weapons Systems Ratchet Lock Castle Nut & End Plate Set was designed to work with their Enhanced Buffer Tube Mod 2, and eliminates the need for staking. These AR15 Lower Parts from Primary Weapons Systems are made of 4140 steel and can be removed easily if needed. The Primary Weapons Systems End Plate & Castle Nut Set is compatible with both commercial and Mil-Spec sized buffer tubes. Choose the Primary Weapons Systems Castle Nut & End Plate Set for easy installation and a solid feel.image

WARNING: California`s Proposition 65

Specifications for Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut:

Manufacturer: Primary Weapons Systems
Color: Black
Fabric/Material: 4140 Steel
Gun Make: AR Platform
Condition: New

Features of Primary Weapons Systems Ratchet Lock Castle Nut & End Plate Set for Buffer Tube Installation:

  • Ratchet-lock design eliminates need for staking the castle nut.
  • Compatible with Mil-Spec and Commercial buffer tubes.
  • Integrated QD mount.
  • Made of 4140 steel.
  • Rock solid lock up.
  • Easy installation and easy removal if needed.

Package Contents:

  • Primary Weapons Systems EBT Mod 2 Ratchet Lock Castle Nut End Plate Set 4BTRLPB1

Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut Orderable Models

List of Orderable Models

Primary Weapons Systems Ratchet Lock End Plate & Castle Nut Set, Black, AR-15, RLCN-KIT , MPN: RLCN-KIT , UPC: 811154033673 , Code: 2D5-REP-PWSRLSMP-RLCN-KIT

Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut Unavailable & Discontinued Models

List of Unorderable Models

USED Primary Weapons Systems Ratchet Lock End Plate & Castle Nut Set, Black, AR-15 4BTRLPB-1F, EDEMO2, Used, Condition Fair , MPN: 4BTRLPB-1F-EDEMO2 , Code: 2D5-REP-PWSRLSMP-4BTRLPB-1F-EDEMO2
USED Primary Weapons Systems Ratchet Lock End Plate & Castle Nut Set, Black, AR-15 4BTRLPB-1F, EDEMO4, Condition Fair, Used , MPN: 4BTRLPB-1F-EDEMO4 , Code: 2D5-REP-PWSRLSMP-4BTRLPB-1F-EDEMO-US-D
USED Primary Weapons Systems Ratchet Lock End Plate & Castle Nut Set, Black, AR-15 4BTRLPB-1F, EDEMO1, Condition Fair, Other , MPN: 4BTRLPB-1F-EDEMO1 , Code: 2D5-REP-PWSRLSMP-4BTRLPB-1F-EDEMO-OT-D
USED Primary Weapons Systems Ratchet Lock End Plate & Castle Nut Set, Black, AR-15 4BTRLPB-1F, EDEMO3, Used, Condition Fair , MPN: 4BTRLPB-1F-EDEMO3 , Code: 2D5-REP-PWSRLSMP-4BTRLPB-1F-EDEMO3
Compare (0)